Revert "HALO: Option to pause the underlying app (2/2)"

This reverts commit 0022e5e5b93ef7d353a432b969afa329524fce05.
Revert "[1/2] Permit home button wake to be configurable"

This reverts commit 4ce3673840ea02a0b8a93621f61870209fc94cd5.
HALO: Option to pause the underlying app (2/2)

- adds an option to pause the active app when using HALO
- this is enabled by default for devices with low memory
- (currently: <640MB RAM available to the kernel)

Conflicts:
	res/values/strings.xml